The Delta STEREO distills all of Classé's innovation and knowledge into a compact high-performance stereo amplifier. In situations where dual mono amplifiers can't be accommodated, Delta STEREO offers uncompromizing performance in a single component.
Read moreAt a glance
All specifications- Frequency response
- 1 Hz to 650 kHz
- Dimensions (W × H × D)
- 444.5 × 222 × 492 mm
- Weight
- 46.4 kg
- Width
- 17.50 in (444 mm)
- Depth
- 19.37 in (492 mm)
- Height
- 8.74 in (222 mm)
Overview
The first 12.5W of power output are pure Class A, and with a total of 250W per channel at its command (over 350W/Ch @ 2Ω), this compact, powerful amplifier drives loudspeakers with utmost confidence.
Highlights
- Up to 12.5W per Channel delivered in pure Class A operation
- 250W per Channel total
- Massive, high-quality power supply
- Custom toroidal transformer
- Hand-laid circuit boards
- 6-layer circuit boards provide for shortened signal and power pathways with lowest noise
- 22 4-pole Mundorf® capacitors
- Custom-made Navcom® feet to absorb vibrations
- Furutech® rhodium-plated RCA and torque-guard speaker connectors
About Classé
“There has to be something better.” These were the words of Mike Viglas in 1979, sending him on a path to partnership with engineer David Reich and the founding of Classé Audio. Mike knew what it was to work hard and build things. A Greek immigrant, Mike arrived in Montréal, Canada as a young man with little money but plenty of energy and determination. He was welcomed by French-Canada and embraced it in return. Opportunities arose wherever Mike made them and year after year he built on his successes. Winters in Florida and summers in Canada, Mike was comfortable, living the good life. Mike was passionate about many things, especially music. His hi fi system was truly high-end and he loved showing it off at parties. While no one could believe that a stereo could cost so much, everyone agreed it sounded amazing. Then the inevitable happened. BOOM! Lights flickered, silence, a strange odor permeated the room and particles, formerly contained within his beloved vacuum-tubed amplifier descended. As the guests pulled capacitor wadding from their hair, Mike, embarrassed, vowed that it would not happen again. There had to be a better way. The problem is common even today. How to get both performance and reliability from high-end electronics? This was top of mind when Mike met David Reich, a talented young engineer building his own solid-state amplifiers. Mike was instantly taken with the sound of David’s amp and together they set out to realize that vow. Classé was founded. Their first amplifier, the DR-2, was introduced in 1980. It was a 25W stereo amplifier operating in class A, which inspired the name of the new company. Other models followed and Classé quickly earned a reputation for both reliability and its open, natural, authoritative sound. Forty years on, Classé remains at the forefront of audio. The iconoclastic and talented Classé Design team in Montréal now has a global reach, being larger and more diverse than ever. Precision manufacturing at the legendary Shirakawa Audio Works in Northern Japan allows today’s Classé to deliver on the performance and reliability always demanded by Mike Viglas. We think he would be proud of what we have achieved. Dave Nauber Brand Director – Classé
All Classé productsFeatures
2

Clarity
Delta STEREO delivers exceptional clarity. Every effort has been made to preserve complete separation between channels, delivering the natural, expansive sound that Classé is legendary for.

Design
Delta STEREO has presence. It’s capabilities are expressed through design and it looks fantastic in any room or installation. Superb material finishes and a pair of custom-designed illuminated VU meters display power output for both channels beautifully. Delta Series design concept is to create a monument to sound. This amplifier looks every bit has capable as it sounds.
Specifications
- Frequency response
- 1 Hz to 650 kHz
- The range of pitches it reproduces, from deep bass to the top of the treble.
- Dimensions (W × H × D)
- 444.5 × 222 × 492 mm
- Width, height and depth, without cables.
- Weight
- 46.4 kg
- Per unit, out of the box.
- Model code
- CLASSE-DELTA-STEREO
- Quote it when you ask a specialist.
Overall Dimensions
- Width
- 17.50 in (444 mm)
- Depth
- 19.37 in (492 mm)
- Height
- 8.74 in (222 mm)
Weight
- Gross Weight
- 116.4 lbs (52.8 kg)
- Net Weight
- 102.3 lbs (46.4 kg)
General
- Frequency Response (-3dB, 50Ω source impedance)
- 1Hz – 650kHz
- Continuous Output Power (at 1kHz, 0.1% THD+N)
- 250W / 8Ω (12.5W in pure Class-A operation) 500W / 4Ω (with AC line held constant)
- Harmonic Distortion (measurement bandwidth: 500kHz, 25Vrms in 4Ω or 8 Ω)
- <0.0016% at 1kHz <0.002% at 10kHz <0.003% at 20kHz
- Harmonic Distortion (measurement bandwidth: 90kHz, 25Vrms in 4Ω or 8 Ω)
- <0.0007% at 1kHz <0.001% at 10kHz <0.0025% at 20kHz
- Peak Output Voltage (nominal AC line)
- 129Vp-p into 8Ω 138Vp-p no load
- Input Impedance (at 1kHz, BAL / SE)
- 82kΩ
- Voltage Gain (at 1kHz, BAL / SE)
- 29dB
- Intermodulation Distortion (SMPTE 4:1) (8Ω or 4Ω, BAL / SE)
- <0.0018%
- Intermodulation Distortion (CCIF) (8Ω or 4Ω, BAL / SE)
- <0.004%
- Signal-to-Noise Ratio (A wtd in parenthesis) (22kHz BW)
- 118dB (120dBA)
- Crosstalk (one channel driven to 250W / 8Ω)
- 124dB (100Hz), 107dB (1kHz), 90dB (10kHz)
- Slew Rate
- 75V / μs
- Output Impedance
- 0.009Ω (100Hz), 0.009Ω (1kHz), 0.012Ω (10kHz)
- Damping Factor (at 1kHz, ref 8Ω)
- 850
Downloads
1
- Delta STEREO Owner’s ManualManual · English · PDF, 808 KBDownload
Awards and press
4

"A perfect performance, like a perfect 10 in the Olympics. The Classé Delta STEREO amplifier is a dream machine for music lovers and home theater enthusiasts living the audiophile lifestyle. [...] The only appropriate term for how the Classé Delta STEREO performed in my system is "perfectly."
Home Theater Review
"Classé's new Delta PRE and STEREO amplifiers are a technical tour de force, with flawless performance. There is no aspect of the sonic performance that I can criticise. This combination has abilities well beyond the asking price, so is heartily recommended." — Mark Gusew
StereoNET
"Classé’s Delta PRE and STEREO are impeccably designed and manufactured products that offer impressive operational flexibility and dependability. These two components are visually appealing and practical to install in a domestic setting. The Delta PRE and STEREO were a pleasure to operate and, more importantly, to listen to." - Andrew Quint
The Absolute Sound"A first-class demonstration from A to Z: there is hardly a better way to sum up the presentation of the new Classé Delta preamplifiers and power amplifiers." - Martin Freund
AV Guide.ch
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